Range



H. D.' SCHALL.

' RANGE.

APPLICAUON FILED MAY 2. 1919.

Patented May 4, 1920.

2 SHEETS-SHEET l.

@54j www@ um 2o 1- tion; inthe-'construction of the joints be.

-its broader aspects is not limited to Vand" tate of Michigan,

H'ENBY D. SCHALL, 0F DETROIT, MICHIGAN,

ASSIGNOR T0 DETROIT STOVE WORKS,

OF DETROIT, MICHIGAN, A CORPORATIONl 0F MICHIGAN.

RANGE.

1,338,870. application mea may 2, 1

To 'all whom it may concern.-

Be it known that I, HENRY D. SCI'TALL, a citizen of the United States of America, re'- sidin' at Detroit, in the county of Wayne lhave inventedcertain new and useful Improvements in Ranges, of which the following is a specification, ref erence being had therein ,to the accompanymg drawings.

This invention relates to ran es and refers more articularly to ranges o the hotel or other arge sizes, although the invent1on 1n the type of heating apparatus mentioned. The present applicatonincludes certain subject matter divided 'out of so-pending application Serial No. 204,533.

The invention resides in the novel construction of'the oven section and its arrange ment with relationto an adjacent top sectween the various insulator sections. ofthe ,oven so that ldissipation of heat is prevented;

. in the provision of a bailie member between in; and in the oven and top plate of the range which rbaiile' also serves as a support for the-top l plate; inthe arrangement of this baffle and .the graduated passage between the top wall of the oven and the top plate so as to produce an eveiiA distribution of the heat and conservel the heat units; in the novel`construction of the 'oven floor or pan; in the m'eans for .guarding againstl interference with thehrise of the heated'air within the ovenby inserting unduly large pans therey vsuch further features of construction and arrangements and combinations ofvpa'rts. as will more fully hereinafter appear.

.In'the drawings: f .Figure 1 is `a vertical' sectional view through a" range embodying my linvention;

Fig'. 2 is a top' plan vlew of the construc- ..tion shown inj Fig. 1;

Fig. 3 is a vertical `sectional view on the line 3-3 .0f Fig. 1;

Fig. Lis a 'perspective view of the oven' plate;

Fig. 5 is a sectional detail view of an'. angle bar which is mounted within the oven upon a side Wall thereof to limit the size,

specification of Letters Patent.

Patented May 4, 1920. 919. serial iNo. 294,150.' f

of cooking vessels that may be inserted in the oven and insure an upward circulation past such vessels. y l

Describing in detail the construction shown in the drawings, A designates a range having an open-top plate B and an oven C, the latter being positioned beneathV one part of the top plate. For supplying heat to the, top plate I preferably employ a plurality of" vburners D which, extend upwardly'y 'from supply pipes D', the supply of gas to'which iscontrolled by suitable shut-oil' valves D2. These valves are preferably located in a line at the front of the stovey and control the sup-V ply from the main pipe or feed line D.

As shown in Fig. 1 the top .plate B is formed in three sections B', B2 and Bi which are supported at ,their edges in grooves or seats E formed in the top ange E of the body A', which latter maybe formed of sheet-metal, or other suitable construction.

For retaining the heat in close proximity to the top plate and-preventing its dissipation below the plane of the burners, I employ a burner block F-of suitable refractory material, which block is provided with'vertical' openings F'through which ther burners D extend. It/will be noticed that the openingsv are of a sufficiently greater diameter 'than` the burners to. permit of surrounding air passages through which the 'burner units in the chamber G in a manner similar to the air passing through the openingsF' isvpreheated by the refractory material, as is like- -wise the gaseous-mixture iiowing through the burner tubes, a complete combustion ofv the gas and a maximumtemperature thus being assured. y It will be `noted that. the section B' of the top plateis'located directly above the burners D the space in betWeenIbeing-just sui-l cient to have the top plate clear the to orf. the blue flame cone of the burners. his will produce an intense heat on the burner section B will then pass from the chamber below the section B to the' chamber below the section- B2 'and from-there to the chamber below the section B3. The chambers below the sections respectively receive a secondary air supply ,l

while the hot gasesof combustion produced by varying the thickness of the -Bz and B3 taper toward the back so that the gas passage is more restricted as it nears the ue or outlet G. This tapering passage is insulating blocks H and H forming the'top of the oven, and to facilitate the even distribution of heat, there is positioned above the oven a diagonally-extending baffle member or deiiector I to compel the gases to travel throughout substantially the entire area of the sections B2 and B3, said member also constituting a supplementary support for the section B2. Preferably said member is formed as a rib integrally depending from the middle section B2 of the top plate.

As shown in Fig. 2, the rib I isarranged to permit a small portion of the gases to pass rearwardly of said rib for'heating the rear portion of the top plate while the kheater portion of the gases are deflected by said rib toward the forward portion of the j stove so as to more intensively heat the front portion of the top plate. The insulating lock F is also provided with supporting ribs or projections F2 which serve to support the section B of the top plate. Thus the entirel topl plate is supported not only by the led e but also by the ribs or flanges F 3 an I, which being indestructible by heat form a permanent support for s'aid plate.

While the heat to the various sectionsof the top Vplate can be varied to suit the temperatures desired, it has been found possible with a range of this kind to maintain the front section B at about 1200 F., the center section B2 at 750 F. and the rear section Ba at. about 450 F. When 'these high temperatures are reached the stack temperature is only about 260; these temperatures, of course, being simply illustrative.

Also the novel arrangement of the passage;

ways and the baHes beneath the sections B and B2 allows all the heat units to be advantageously employed..

veferring now in detail to the oven construction, it will be noticed that the side walls and bottom sections-`4 J, J and J2 are formed of heat-insulating blocks which are preferably-made in sections having interlocking joints K. This not only facilitates the assembling of the range but the particular construction of the joint prevents the waste of heat from the oven in the following manner: Each of the joints is formed with an upper horizontal portion K', a lower horizontal portion K2 and a vertical connecting portion K3. In each case the blocks are so arranged that the lower horizontal portion is at the outside of the wall. Therefore, in attempting to escape throurh the joints the heated air vwill be co'mpe led l t'o )ass downward through the vertical portion .lis in order to escape. As the tendency of the heated gas is to rise, this particular construction of joint will, to amaterialextent, prevent the escape of the heated air from the oven. The same stepped joint construction is also employed in the insulator blocks L surrounding the burner section. Another feature of the oven construction resides inthe formation of a supporting pan M which is located above the oven burners N. As shown in Fig. 7, the oven` plate M is formed with inverted U-shaped ribs Owhich are spaced apart and the intermediate por-y tions O perforated at O2.

This construction of the plate M gives the same a desirable strength and not only eliminates the danger of burning' the article in the oven but also provides greater radiating surface, and the perfor-ations permit of the oven. To insure the provision of equal spaces for upward circulation at each side of the vessel and to also prevent the use of an unduly wide vessel such as might seriously 'interfere with such circulation, a pair of angle strips S is horizontall secured to each side wall of the oven, saidy strips having openings T through which thel hot air and gases may rise, inclined tongues U being struck upwardly. from said openings and preventing closing of the same in case said angle strips are improperly used, as indicated in dash lines in Fig. 5, as supports for a pan or other cooking vessel.

What I claim as my invention is:

l. In a range, the combination with an oven, of burners positioned in the lower part of the oven, a door opening located at the front'of the oven, and a supporting plate positioned above said burners and having a pluralit of integrally formed lU- shaped ribs, sald plate being perforated to assist the circulation of the heat and having the upper surface of said ribs located substantially in the plane of the lower edge of the oven door opening, said ribs running lengthwise of the oven toward the front.

'2. In a range, the combination with an oven, of a member secured to a wall of the oven interiorly thereof for spacing cooking vessels from said wall and insuring a free rise of the hot gases past such vessels. said member having openings therein for passage of the gases, and tongues being struck upwardly from said openings.

3. lIn a. range, the combination with an oven, of a pair of angle bars secured to the side walls of said oven and extending substantially from f said bars formlng spacers culatlon spaces at each in the oven and 5 lation openings.

4;. In a range,

oven, of burner.

ront to back. of the oven,

to maintain cirside'of a Vessel Withbeing formed with olrcu-v the combination with an positioned in thelower part of said oven, a supporting plate positioned above said burners having a plurality of integral U-shaped ribs and perfo- 10 rated to assist the circulation of the heatA In testimony whereof I aix my signature.

HENRY D. SGHALL. 

